<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>通用样式图（一般类样式表）</title>
        <link rel="stylesheet" href="normalize.css" type="text/css">
    </head>
    <body>
        <h1>这个标题居中显示</h1>
        <p>这个段落居中显示</p>
    </body>
</html>